What are the rules for mixing Chinese and English cards in a Riftbound deck?

Ruling: You may mix cards of any official language (Chinese, English, etc.) within your deck, including the Main Deck, as long as all cards are in identical opaque sleeves and are not physically distinguishable from one another when sleeved.

Nuances:

• Different language printings may have slight variations in card stock thickness, weight, or texture that could make them distinguishable even when sleeved
• If a judge determines that mixed-language cards are physically distinguishable (by feel, visible deck profile differences, etc.), they may rule the deck as having "marked cards" and require changes
• Players are responsible for ensuring their mixed-language cards are not distinguishable through sleeves
• At high-level competitive play, keeping each shuffled zone (Main Deck, Rune Deck) in a single language is recommended to avoid potential marked card issues
• Non-shuffled zones (Legend, Battlefields) can be any language without concern since they are never randomized
• Players may call a judge at any time to receive official English card text if there are translation questions or disputes